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Open-source evaluation and tracking for LLM experiments
TruLens helps you evaluate and trace LLM and RAG apps. It introduced the "RAG triad" of context relevance, groundedness and answer relevance, which many teams still use to judge retrieval quality.
You instrument your app, record runs, and view scores in a dashboard to compare versions. The project is now maintained by Snowflake.
It is lighter than full observability platforms, which suits experimentation and research.
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